How to report a bug in Diablo III

What to do if you can't complete this quest.

What to do if you are missing the achievement "Heroic: War is Hell" after winning a warfront and completing the quest.

What to do if you can't find or start this quest.

What to do if you didn't receive loot in World of Warcraft Classic

Information about being unable to trade dungeon/raid/instance loot to another player

Information on unlooted items and The Postmaster.

Troubleshooting the World of Warcraft Armory site not matching in-game information

Character didn't receive loot in World of Warcraft.

Troubleshooting for unresponsive mouse cursor issues in Diablo III